Lenovo's flagship Moto Z series made its debut in June and hit stores first in the US in August, followed by India and Asian regions. Within three months, the company has sold a record number of smartphone units worldwide.

Lenovo's CEO took to Twitter to confirm that the company sold over 1 million Moto Z units across global markets and attributed the success to the innovative Moto Mods accessories.

For the past few years, there's a state of stagnation in terms of innovation in the smartphone development. Every new flagship phone in the market has a standard upgrade in terms of RAM, storage, battery capacity and increased MP counts in camera.

There was barely any difference between the rival brands, but with the launch of LG G5 in February, sparked euphoria among phone enthusiasts. LG G5's modular concept-based design allowed user to detach the lower chin and replace the battery at will. The user just had to press the dock button provided in the left-edge at the bottom edge.

But, LG's shoddy paint-job on the device's cover and unreliable battery back-up did not go down well the critics and the consumers.

Then, Lenovo launched Moto Z series with Moto Mods, almost three months after the LG G5 and was initially thought would meet the same fate.

But, Moto Mods was pretty different. Unlike LG G5, Moto Z series owners need not have to worry about switching off the device or removing the shell on the back at all, as the Moto Mods are magnet-based swappable case, which attaches to the smartphone's pogo pin connectors.

Expectedly, people across the world have lapped up Moto Z's Moto Mods and the sales record says it all.

"Shipments in MBG (Mobile Business Group) product lines in the second quarter grew almost 25 percent compared to the previous quarter to a total of 14 million. Lenovo continued to increase mobile shipments in both Asia Pacific and India, with mobile shipments in India increasing 15 percent year-over-year," Lenovo said in its second quarter earnings report.

"Moto shipments were up almost 40 percent from the previous quarter due to Moto G and successful launches of new Moto Z and Moto Mods," it added.